Sequential bilingual heritage children's L1 attrition in lexical retrieval: Age of acquisition versus language experience

This study investigated the unresolved issue of potential sources of heritage language attrition. To test contributing effects of three learner variables – age of second language acquisition, length of residence, and language input – on heritage children's lexical retrieval accuracy and speed, we conducted a real-time word naming task with 68 children (age 11–14 years) living in South Korea who spoke either Chinese or Russian as a heritage language. Results of regression analyses showed that the participants were less accurate and slower in naming target words in their heritage language as their length of residence in Korea and the amount of Korean input increased. The age of Korean acquisition did not significantly influence their performance. These findings support the claim that heritage speakers’ language experience is a more reliable predictor of first language attrition than age of acquisition. We discuss these findings in light of different approaches to explaining language attrition.

Language control in regional dialect speakers – monolingual by name, bilingual by nature?

While research on bilingual language processing is sensitive to different usage contexts, monolinguals are still often treated as a homogeneous control group, despite frequently using multiple varieties that may require engagement of control mechanisms during lexical access. Adapting a language-switching task for speakers of (Scottish) Standard English and Orcadian Scots, we demonstrate switch cost asymmetries with longer naming latencies when switching back into Orcadian. This pattern, which is reminiscent of unbalanced bilinguals, suggests that Orcadian is the dominant variety of these participants – despite the fact they might be regarded as English monolinguals because of sociolinguistic factors. In conjunction with the observed mixing cost and cognate facilitation effect (indicative of proactive language control and parallel language activation, respectively), these findings show that ‘monolinguals’ need to be scrutinised for routine use of different varieties to gain a better understanding of whether and how mechanisms underlying their lexical access resemble those of bilinguals.

Effect of bilingualism on infants’ cognitive flexibility

Research suggests that bilinguals often outperform monolinguals on tasks that tap into executive functions, such as those requiring conflict resolution and cognitive flexibility. Recently, better attentional control has been detected in infants as young as 6 months, thereby providing a possible basis for a cognitive benefit before language production. The goal of the present study was to examine if cognitive flexibility is more advanced in bilingual infants. A detour reaching task assessing conflict resolution, a delayed response task assessing shifting, and a multiple location task assessing maintaining, were administered to 17-month-old infants. The main findings revealed that being bilingual did not improve performance on any of the executive function tasks. Furthermore, current exposure to a second language or language proficiency did not impact executive functioning. We conclude that a bilingual advantage in cognitive flexibility may not be present before children have enough experience in code switching.

Did you see that? False memories for emotional words in bilingual children

When participants process a list of semantically strongly related words, the ones that were not presented may later be said, falsely, to have been on the list. This ‘false memory effect’ has been investigated by means of the DRM paradigm. We applied an emotional version of it to assess the false memory effect for emotional words in bilingual children with a minority language as L1 (their mother tongue) and a monolingual control group. We found that the higher emotionality of the words enhances memory distortion for both the bilingual and the monolingual children, in spite of the disadvantage related to vocabulary skills and of the socioeconomic status that acts on semantic processing independently from the condition of bilingualism. We conclude that bilingual children develop their semantic knowledge separately from their vocabulary skills and parallel to their monolingual peers, with a comparable role played by Arousal and Valence.

The reduced embodiment of a second language

Substantial evidence indicates that first language (L1) comprehension involves embodied visual simulations. The present study tested the assumption that a formally learned second language (L2), which is less related to real-life experiences, is processed in a less embodied manner relative to a naturally acquired L1. To this end, bilingual participants completed the same task in their L1 and L2. In the task, they read sentences and decided immediately after each sentence whether a pictured object had been mentioned in the preceding sentence. Responses were significantly faster when the shape of the object in the picture matched rather than mismatched the sentence-implied shape, but only in the L1, and only when the L1 block was performed before the L2 block. These findings suggest that embodied visual simulations are reduced in a formally learned L2 and may be subjected to cross-language influences.

Discourse fluency modulates spoken word recognition in monolingual and L2 speakers

We investigated whether fluent language production is associated with greater skill in resolving lexical competition during spoken word recognition and ignoring irrelevant information in non-linguistic tasks. Native English monolinguals and native English L2 learners, who varied on measures of discourse/verbal fluency and cognitive control, identified spoken English words from dense (e.g., BAG) and sparse (e.g., BALL) phonological neighborhoods in moderate noise. Participants were slower in recognizing spoken words from denser neighborhoods. The inhibitory effect of phonological neighborhood density was smaller for English monolinguals and L2 learners with higher speech production fluency, but was unrelated to cognitive control as indexed by performance on the Simon task. Converging evidence from within-language effects in monolinguals and cross-language effects in L2 learners suggests that fluent language production involves a competitive selection process that may not engage all domain-general control mechanisms. Results suggest that language experience may capture individual variation in lexical competition resolution.